Abstract
The mutual influence of the parallel excavation of the tunnel cannot be ignored. The control of the distance between the faces of the two tunnels is also a difficult point in the construction process. Taking the Nanshan Tunnel of Tieben Expressway in Liaoning Province as the background, the blasting simulation research was carried out under the conditions of different distances between the tunnel faces. Firstly, based on the field test data, the blasting conditions under different tunnel faces were simulated by numerical simulation. The research shows that: (1) The velocity effect of the preceding hole on the subsequent hole is embodied as: the smaller the distance between the face of the tunnel, the more obvious the velocity effect of the subsequent hole; the velocity effect of the subsequent hole on the preceding hole is mainly reflected in the change of the velocity propagation process; (2) The influence of the leading hole on the displacement of the trailing hole is mainly reflected in the following: the greater the distance between the tunnel faces, the later the peak appears, and the smaller the displacement peak; the influence of the trailing hole on the displacement of the leading hole is mainly reflected in the following: the greater the distance between the tunnel faces, the smaller the peak displacement.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (No. 51278467), Scientific and Technological Research Projects of China Construction seventh Engineering Division. Co. Ltd (No. CSCEC7b-2015-Z-12), and Science and Technology Project of Henan Province (No. 162102210019).
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Zhang, Y., Yang, F. & Huang, L. Study on the Dynamic Responses of Tunnel Linings with Small Net Distance Under Bias Pressures Caused by blasting. Geotech Geol Eng 40, 605–615 (2022). https://doi.org/10.1007/s10706-021-01887-9
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DOI: https://doi.org/10.1007/s10706-021-01887-9